The main benefits are that you are visa-exempt so many people "wait out" the process in Canada. You don't need a visitor permit typically unless you are planning on staying more than 6 months. Of course you should always be prepared to show proof of ties to the United States to the border agent. The other benefit is that interviews for U.S. citizens are practically unheard of. Being processed faster is not among the benefits.

The main benefits are that you are visa-exempt so many people "wait out" the process in Canada. You don't need a visitor permit typically unless you are planning on staying more than 6 months. Of course you should always be prepared to show proof of ties to the United States to the border agent. The other benefit is that interviews for U.S. citizens are practically unheard of. Being processed faster is not among the benefits.

Yes, the reason being an American while immigrating to Canada is beneficial is because the two countries are so similar in culture and living standards, that the visa officers are extremely unlikely to think the relationship between an American and a Canadian is fraudulent. Therefore processing is easier, less proof is needed, and an interview is usually not required.